Abstract
A study has been made to investigate superplastic deformation behavior of the Ti-6Al-4V alloy based on the theory of inelastic deformation which consists of two mechanisms, one, the grain matrix deformation and, two, the grain boundary sliding. Load relaxation tests were employed in temperature ranges from 600 °C to 927 °C to obtain stress-strain rate curves for the microstructures of 2.5 μm-16 μm grain sizes. Superplastic deformation tests were also conducted to verify superplastic deformation behavior. The results showed that grain matrix deformation was dominant at 600 °C and grain boundary sliding became dominant over the temperature of 800 °C. Grain matrix deformation behavior was different from power law creep but found to be consistent with the state equation based on dislocation dynamics. Because of rapid grain coarsening which led to early cavity formation, tensile elongation was reduced at 900 °C than at 800 °C.
| Original language | English |
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| Pages | 275-282 |
| Number of pages | 8 |
| State | Published - 1994 |
| Event | Proceedings of the 1st International Symposium on Metallurgy and Technology of Practical Titanium Alloys - Chiba, Jpn Duration: 7 Dec 1993 → 10 Dec 1993 |
Conference
| Conference | Proceedings of the 1st International Symposium on Metallurgy and Technology of Practical Titanium Alloys |
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| City | Chiba, Jpn |
| Period | 7/12/93 → 10/12/93 |